Tension device for key-levers of type-writers.



No. 759,807. PATENTED MAY 10, 1904.

B. A. BROOKS. V TENSION DEVICE FOR KEY LEVBRS OFTYPE WRITERS.

APPLICATION FILED NOV. 24, 1900. N0 BIO-DEL.

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No. 759,807. Patented May 10, 1904.

UNITED STATEs PATENT OEEIoE.

BYRON A. BROOKS, OF BROOKLYN, NEW YORK, ASSIGNOR TO UNION TYPE- l/VRITERCOMPANY, OF JERSEY CITY, NEWV JERSEY, A CORPORATION OF NEW JERSEY.

TENSION DEVICE FOR KEY-LEVERS OF TYPE-WRITERS- SPECIFICATION formingpart of Letters Patent No. 759,807, dated May 10, 1904.

Original application filed April 26, 1894, Serial No. 509,086. Dividedand this application filed November 24, 1900. Serial No. 37,626. (Nomodel.)

.To all whom it may concern:

Be it known that I, BYRON A. BROOKS, a citi-.

zen of the United States, and a resident of the city of New York,borough of Brooklyn, in

the county of Kings and State of New York,

, have invented a new and Improved Tension Device for Key-Levers ofType-Writers, of

which, the following is a full, clear, and exact description.

My invention relates to an improvement by which the tension upon thekey-levers may be adjusted independently, and comprises mechanism whichwill be hereinafter described, and particularly pointed out in theclaims.

I5 This application is a division of my application, Serial No. 509,086,filed April 26, 1894, now Patent No. 677,110, issued June 25, 1901.

Reference is to be had to the accompanying drawings, forming a part ofthis specification,

2 in which similar characters of reference indicate corresponding partsin both figures.

Figure 1 is a perspective of my improvement, only one key-lever beingshown; and Fig. 2 is a side elevation showing my improvement and itsapplication to the key-levers.

This application is a division of my application for improvement intype-writers, filed April 26, 1894, Serial No. 509,086.

The object sought herein is to provide means by which the tension uponthe key-levers may be independently adjusted. With this object I place aplate A beneath the key-levers and extending transversely thereof, saidplate be ing notched to form. upon one side a series of parallel arms a,resembling somewhat the teeth of a comb. As many such arms are providedas there are key-levers, and each key-leverB is connected with itsparticular arm by elastic connection, as a spring C, which is the usual4 spring used to secure the return of the keylever to its normalposition after depression. The key-levees are pivoted upon any suitablesupport, as D.

While the arms a would ordinarily have a certain amount of spring, thisis a mere incident, due to the elasticity of all materials, and is notespecially design ed or desired. It is in tended that the material ofwhich the plate A and the arms a are made be such that it may be readilybent and given a permanent set. 5 This is done when it is desired toadjust the tension upon any key-lever, the connected arm a being benttoward or from the key-lever as necessary to vary the tension.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent 1. In a type-writing machine the combinationwith the key-levers and an elastic tension member for each lever, ofindcpemlently-adj ustable supports for said tension members consistingof arms which may be bent and given a permanent set. i

2. In a type-writer the combination with the key-levers and elastictension members inde- 5 pendently connected with each key-lever ofsupports for said tension members consisting of a plate notched to forma series of arms or teeth, capable of independent adjustment to whichthe elastic tension members are connect- 7 ed, a separate arm beingprovided for each tension member.

3. In a type-Writer the combination with a series of key-levers, of aseries of springs acting at one end upon the key-levers to maintain themin their normal position, and independently-adjustable supports for theother ends of the springs, whereby their tension may be adjusted.

In testimony whereof I have signed my name 1 to this. specification inthe presence of the two subscribing witnesses.

BYRON A. BROOKS.

Witnesses:

H. L. REYNOLDs, GEORGE I-I. Hose.

